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Home >> Nissan-Datsun >> 2004 >> Sentra SE-R Spec V >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System - Qr25DE >> DTC P1148: Closed Loop Control >> Overall Function Check (A/T MODELS ULEV AND M/T MODELS) >> With GST
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With GST

  1. Start engine and warm it up to normal operating temperature.
  2. Set voltmeter probes between ECM terminal 35 [HO2S1 (B1) signal] and engine ground.
  3. Check the following with engine speed held at 2, 000 RPM constant under no-load.
    • The voltage should go above 0.70V at least once.
    • The voltage should go below 0.21V at least once.
  4. If NG, go to "DIAGNOSTIC PROCEDURE (A/T MODELS ULEV AND M/T MODELS) ".
    Fig 1: Setting Voltmeter Probes Between ECM Terminal 35 & Ground
    G00778209Courtesy of NISSAN MOTOR CO., U.S.A.
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